ISO 289-3:2015 pdf free
ISO 289-3:2015 pdf free.Rubber, unvulcanized – Determinations using a shearing-disc viscometer
This part of ISO 289 specifies a method for determining the Delta Mooney value of non pigmented, oil-extended emulsion-polymerized styrene-butadiene rubber.
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 289-1， Rubber, unvulcanised 一Determinations using a shearing-disc viscometer 一Part 1: Determination of Mooney viscosity
ISO 1795, Rubber, raw natural and raw synthetic一Sampling and further preparative procedures
difference between the minimum Mooney viscosity soon after starting the rotor and the subsequent maximum Mooney viscosity for an unmassed test sample
Note 1 to entry: The values are complementary and any combination may be used to assist in distinguishing those rubbers that are easy to process from those that process with significantly greater difficulty.
The test consists of determining the difference between the Mooney viscosity values at two specified times (Delta Mooney A) or at two specified points on the curve of Mooney viscosity against time (Delta Mooney B), see Figure 1.
The test temperature shall be 100 °C±0,5 °C, this being the temperature of the closed dies with the rotor in place and the cavity empty.
The test shall be conducted according to the procedure described in ISO 289-1, using the large rotor, a preheating time of 1 min and a running time of either 7 min or 15 min.
If the viscosity has not been recorded continuously, plot the observed Mooney viscosity values as specified in ISO 289-1.
NOTE An automatic recorder is strongly recommended.
The Delta Mooney A1 value shall be determined as the difference between the Mooney viscosities recorded at running times of 15 min and 1 min.
The Delta Mooney A2 value shall be determined as the difference between the Mooney viscosities recorded at running times of 7 min and 1 min.
The Delta Mooney A3 value shall be determined as the difference between the Mooney viscosities recorded at running times of 15 min and 1,5 min.
The Delta Mooney B value shall be determined as the difference between the minimum and maximum Mooney viscosities (see Figure 1).
NOTE For Delta Mooney A, lower (in most cases, more negative) values are indicative of easier-processing rubbers. For Delta Mooney B, lower values also indicate easier processing.ISO 289-3 pdf download.
